This 4000 watt 12 volt to 120/240Volt low frequency pure sine wave inverter charger is a power inverter, battery charger and transfer switch . It outputs 16.7 amp on 240Vac(4000 watts), and 16.7 amps on each of its two 120Vac hot lines.

Features include 300% surge output, overload, short circuit, over-temperature, under & over voltage protections. VIEW FULL DESCRIPTION

The inverter accepts 12 volts DC input, which is great for vehicle upfitting, RV and boat applications with a 12 volt battery system.
The 4000 watt inverter charger consumes 45 watts in idle and 18 watts in power saver mode.
The marine-coated or conformal-coated printed circuit boards also make the 4000 watt inverter charger great for mobile or boat applications with protection from dust or water vapor in the air.
This 4KW inverter is labelled as “low frequency” by virtue of the rugged transformer working at a low frequency of 50Hz or 60Hz.
There is a DIP switch to control the output AC frequency between 50Hz and 60Hz.
This 4000 watt inverter charger produces a pure sine wave with a THD(total harmonic distortion) under 10%. It can smoothly run televisions, laser jet printers, CPAP machines and other medical equipments.